Numbers error bars vanish with Standard Deviation
I'm learning Numbers. I click a chart I've made -> I choose Error Bars -> Positive and Negative -> Use: Standard Deviation -> all error bars disappear!! Standard Deviation of the data set should show as an error bar on every column!
With any other Use setting, it just puts in some default error bars whose value appears to be NOT the Standard Deviation, and cannot be changed. Changing the Range value does nothing.
Can someone help please?
iMac 27″ 5K, macOS 10.12